Numberblocks 1-5, 6-10, 16-20 20-25 and 26-29 Perfecr for any number faNumberblocks 1-20 ? Arithmetic Learning Toys: The Cbeebies characters will make learning fun for any Numberblocks fan ? Colourful and Fun cubes: Includes vibrant pieces that can stack together Make the Numberblock character or invent you own. puffy sheets to stick onto blocks ? Safe Quality Learning Resources: minimal design with smooth surface made from durable plastic. Number blocks are made by environmental friendly materials, which is safe for kids. ? Size Recommendation: Size-- 300mm x250mm | For children over 3 years old. ? Learning and Developing foundation arithmetic skills: These maths blocks can help children have fun in learning and improve their arithmetic calculation skills at the same time, It can support kid